/Engine/Plugins/Developer/Concert/ConcertMain/Source/Concert/Public/ConcertMessageData.h
constexpr [EConcertServerFlags](API\Plugins\Concert\EConcertServerFlags) operator& ( [EConcertServerFlags](API\Plugins\Concert\EConcertServerFlags) Lhs, [EConcertServerFlags](API\Plugins\Concert\EConcertServerFlags) Rhs )